phthongal (FTHONG-uhl) - adj., formed into or characterized by voice, voiced, vocalized.
If that first syllable is looking vaguely familiar, we usually see it with a prefix as diphthong, a vowel with two voiced sounds, as in eye. There are also triphthongs and monophthongs. There is also, and this is an even rarer word, a phthongometer, an obsolete term for an instrument for measuring vocal sounds, now usually called a phonometer. All of these are derived from the Ancient Greek phthóngos, voice/sound.
---L.
If that first syllable is looking vaguely familiar, we usually see it with a prefix as diphthong, a vowel with two voiced sounds, as in eye. There are also triphthongs and monophthongs. There is also, and this is an even rarer word, a phthongometer, an obsolete term for an instrument for measuring vocal sounds, now usually called a phonometer. All of these are derived from the Ancient Greek phthóngos, voice/sound.
---L.